Yapp’s Controversial Tournament-Winning Shot in the 8-Ball World Championship … Was it a Foul?

[dr_dave]

FYI, I just posted a new video with a thorough analysis of the call on the final shot in the 2026 8-Ball World Championship. The shot was taken by Aloysius Yapp against Francisco Sanchez Ruiz (FSR). The shot, which was called good, gave Yapp the title and $90,000. Conclusive proof the shot was a foul is provided along with advice on how to judge wrong-ball-first shots like this accurately. Check it out:

Contents:

• 0:00 - Intro
• 0:42 - The Shot
• 3:25 - Background
• 5:34 - Shot Analysis
• 8:47 - Examples
• 11:12 - Recommendations
• 13:39 - Wrap-Up

Supporting Resources:

• wrong-ball-first fouls and how to judge them:
• rule resource page
• fouls resource page
• example bad and interesting call is past pro tournament matches
• WPA rules update video
• video of entire match
• link to final shot in the video

As always, I look forward to your feedback, comments, questions, complaints, and requests.

Enjoy!

 

[u12armresl]

After watching, I do not see how you can say any different than the call on the table. There is no new viewpoint or footage.

 

[sjm]

I wasn't watching the match, so this is my first look at the final shot.

While I figured this was a foul based on cue ball direction, I don't think it was as obvious as the Capito foul vs Lechner in 2025. It's bizarre that referees don't understand the principles governing good and bad hits when two object balls are near each other. So often, cue ball direction and/or speed will make the call obvious, but referees need better training. In the end, the referee clearly lacked the needed understanding to call a foul, and given this, could not logically call a foul here. I view this as a "lack of knowledge" situation, not a "grossly mistaken call" situation. Based on the referee's knowledge, the right call was made. Still, referees who don't have the knowledge to judge these situations should not get the nod in the final of a world championship.

 

[GideonF]

After watching, I do not see how you can say any different than the call on the table. There is no new viewpoint or footage.

If you watched the video, I don’t see how you can not call it a foul. As Dr Dave says, the action of the CB tells the tale.

 

[straightline]

FYI, I just posted a new video with a thorough analysis of the call on the final shot in the 2026 8-Ball World Championship. The shot was taken by Aloysius Yapp against Francisco Sanchez Ruiz (FSR). The shot, which was called good, gave Yapp the title and $90,000. Conclusive proof the shot was a foul is provided along with advice on how to judge wrong-ball-first shots like this accurately. Check it out:

Contents:

• 0:00 - Intro
• 0:42 - The Shot
• 3:25 - Background
• 5:34 - Shot Analysis
• 8:47 - Examples
• 11:12 - Recommendations
• 13:39 - Wrap-Up

Supporting Resources:

• wrong-ball-first fouls and how to judge them:
• rule resource page
• fouls resource page
• example bad and interesting call is past pro tournament matches
• WPA rules update video
• video of entire match
• link to final shot in the video

As always, I look forward to your feedback, comments, questions, complaints, and requests.

Enjoy!

Besides foul, I'd say the way to shoot that is into the right tit. I have explained debatable hits to the bar rules crowd by calling the OB direction - an element most of them get. Know your buckets. Have to mention that most of the good hits went off the right facing. Haven't you done a clip on how much pocket you actually have?

 

[dr_dave]

If you watched the video, I don’t see how you can not call it a foul. As Dr Dave says, the action of the CB tells the tale.

I agree 100%. Any pool player who watches the entire video and still thinks the shot could have been good needs to learn a little more about fouls and how to judge them.

 

[dr_dave]

straightline said:
Have to mention that most of the good hits went off the right facing. Haven't you done a clip on how much pocket you actually have?

Yes. See:

 

[dr_dave]

While I figured this was a foul based on cue ball direction, I don't think it was as obvious at the Capito foul vs Lechner in 2025. It's bizarre that referees don't understand the principles governing good and bad hits when two object balls are near each other. So often, cue ball direction and/or speed will make the call obvious, but referees need better training. In the end, the referee clearly lacked the needed understanding to call a foul, and given this, could not logically call a foul here. I view this as a "lack of knowledge" situation, not a "grossly mistaken call" situation.

As always, well stated.

... referees who don't have the knowledge to judge these situations should not get the nod in the final of a world championship.

Everybody makes mistakes. Some top referees have made many. All we can ask is that they all learn from these mistakes.

 

[ctran]

in many situation like this, refs need to be able to anticipate the foul when players prepare for the shot.

we can see many of them are focused, cannot say they are not, but they dont or not able to anticipate the foul

for shots like jump shots, the anticipation of cueball hitting obstable ball or like finger touching balls, it is easier to anticipate than object balls close to each other or object ball close to rails and anticipating which was hit first

and that anticipation requires playing background, i think.

 

[straightline]

in many situation like this, refs need to be able to anticipate the foul when players prepare for the shot.

we can see many of them are focused, cannot say they are not, but they dont or not able to anticipate the foul

for shots like jump shots, the anticipation of cueball hitting obstable ball or like finger touching balls, it is easier to anticipate than object balls close to each other or object ball close to rails and anticipating which was hit first

and that anticipation requires playing background, i think.

Do you think they should intervene - if only for a better look?

 

[uk_9_ball_convert]

Two things I disagree with, you said if you were FSR you would be challenging the call, but his view of the table was blocked by Yapp who was directly infront of him as he played the shot so realistically FSR didn't know what happened so was never going to say anything. Wonder what he thinks of it now.

And you think the ref should have taken longer, but someone announced over the tannoy that Yapp was champion almost as soon as the black went in, so that opportunity was taken out of her hands. I feel like the person on the tannoy is partially responsible for it not to have been properly reviewed, pretty hard to roll back a decision after you've publicly announced the champion.

 

[Baby Huey]

Dr Dave your previous instructional videos in this area have helped immensely in determining "bad/questionable" hits on balls. Whether video was available, the reaction of the cueball following the path of the eight ball should have been the determining factor for the referee to call a bad hit. Here's where referee's training and general knowledge is most important in their roles as "judges." Thank you.

 

[Breaking Bad]

The reffing system needs a reboot. Why would the ref be so far away from the table on what will obviously be a close call?

 

[ctran]

Do you think they should intervene - if only for a better look?

they should, and it's their rights to intervene even before the player shoots, just a quick close look, may be 2-3secs

they may think a focused look at the contact is enough to make the call, but in many cases it's not enough, the contact is so fast and in just a blink they realize they are behind

I have done refereeing and mentored some younger refs too

 

[td873]

FYI, I just posted a new video with a thorough analysis of the call on the final shot in the 2026 8-Ball World Championship. The shot was taken by Aloysius Yapp against Francisco Sanchez Ruiz (FSR). The shot, which was called good, gave Yapp the title and $90,000. Conclusive proof the shot was a foul is provided along with advice on how to judge wrong-ball-first shots like this accurately. Check it out:

​

Enjoy!

[Cross-post from other thread - simulation seems to match Dr. Dave's analysis, which is expected IMO]

FWIW, I asked ChatGPT to create a physics-based analysis and statistical model (including actual physical parameters as well as information gleaned from Dr. Dave), then run Monte Carlo simulations on extreme right spin shots and then to plot the results of
1) hitting 4 first and
2) hitting 8 first.

I had it run 250,000 attempts and show the results on an overhead of the actual [real world] table. These tests resulted in resting cue ball locations that had no overlap between 8-ball-first and 4-ball-first shots (as would be expected). The estimated end location of the actual shot aligns with a 4-first hit. I then had it run a second simulation at 25% higher speed (10,000 attempts) to show a broader plot.

Below are the graphs and here is ChatGPT's answer: Under standard WPA rules, such contact would constitute a foul. However, absent clear real-time evidence, the original ruling remains valid.

[edit: the object balls are so close, and are separately approximately by the diameter of a ball. Super close hit. The line of centers [arguably] supports that the cue ball path will almost exclusively be because of natural roll after contact. The cue ball contacts the 2nd ball (whatever that is) almost immediately and would lose almost all movement along the tangent line. The resulting location is largely a result roll.

-td

 

[1984]

Hello,
the referee stood in the line of the object ball, which generally is a good choice. But in that situation that doesn’t help.

Yes we need to have better referees. But how to pay them, when even a good pro cannot make a living out of playing pool.

But I was very happy the way FSR acted in that situation. He is a real sportsman and knew that it wouldn’t change a thing if he called it a foul. He didn’t stand up and couldn’t it see it. But I think he knew that it was close. I was watching it life and knew strokes ahead it will be tricky.


1984

 

[GideonF]

Two things I disagree with, you said if you were FSR you would be challenging the call, but his view of the table was blocked by Yapp who was directly infront of him as he played the shot so realistically FSR didn't know what happened so was never going to say anything. Wonder what he thinks of it now.

See the attached FB post from Appleton on this point.

 

[mareh]

Yapp knew it was a foul. So for me, he is just a piece of shit.
Not a way to win WC.

 

[sjm]

Everybody makes mistakes. Some top referees have made many. All we can ask is that they all learn from these mistakes.

Yes, but they are not learning from their mistakes., so I'm a lot more concerned about it than you.

By every reckoning, the Capito foul that (possibly) cost Lechner a spot in the 2025 Hanoi Open semifinals should have given rise to remedial action by WPA to train referees. The most incredible thing about the Capito call at the Hanoi Open, among the worst calls I've seen in my fifty years around pro pool, is that AFTER a video review by the head referee, the incredibly embarrassing call was upheld by the head referee. The message was clear. Referees lack some of the knowledge to do their job as well as they might.

Similarly, when WAXGATE happened at the 2025 WPC, it was obvious to numerous players that some were doctoring the cue ball, not only observing it, but because the cue ball was, far too often, "behaving" in a manner deemed near impossible and irreconcilable with all their experience. I firmly believe that the referees noticed it, too but, if so, they opted not to enforce a rule that WPA noted, in a press release that same week, fell under "unsportsmanslike conduct" rules long on the books. If the refs did not notice it, there is, once again, a problem with referees not showing up to matches with the right knowledge.

I'm fine with referees making some errors in observation or judgment from time to time, for they are only human. They will fail to notice or even misjudge the occasional shirt foul, double hit. or ever-so-slight movement of an object ball, and that's unfortunate but to be expected.

I'm not fine with referees showing up to work without the knowledge needed to do their jobs effectively and, in my opinion, for the third time in the past year, referee ineffectiveness reared its ugly head in major championship play.

 

[uk_9_ball_convert]

Yes, but they are not learning from their mistakes., so I'm a lot more concerned about it than you.

By every reckoning, the Capito foul that cost Lechner a spot in the 2025 Hanoi Open semifinals should have given rise to remedial action by WPA to train referees. The most incredible thing about the Capito call at the Hanoi Open, among the worst calls I've seen in my fifty years around pro pool, is that AFTER a video review by the head referee, the incredibly embarrassing call was upheld by the head referee. The message was clear. Referees lack some of the knowledge to do their job as well as they might.

Similarly, when WAXGATE happened at the 2025 WPC, it was obvious to numerous players that some were doctoring the cue ball, not only observing it, but because the cue ball was, far too often, "behaving" in a manner deemed near impossible and irreconcilable with all their experience. I firmly believe that the referees noticed it, too but, if so, they opted not to enforce a rule that WPA noted, in a press release that same week, fell under "unsportsmanslike conduct" rules long on the books. If the refs did not notice it, there is, once again, a problem with referees not showing up to matches with the right knowledge.

I'm fine with referees making some errors in observation or judgment from time to time, for they are only human. They will fail to notice or even misjudge the occasional shirt foul, double hit. or ever-so-slight movement of an object ball, and that's unfortunate but to be expected.

I'm not fine with referees showing up to work without the knowledge needed to do their jobs effectively and, in my opinion, for the third time in the past year, referee ineffectiveness reared its ugly head in major championship play.

I wonder given how little money there is in pool how much referees are paid and what percentage of their income comes from being a referee. I presume it's not a full time job. In an ideal world referees would be well trained and there would be a referee at every table at all times. Whether that's financially feasible or not I don't know. Might be wrong but feel you see different referees at different tournaments depending on where the world the tournament is. In an ideal world the best refs would be part of the tour, travelling to all the big tournaments.